Playback live stream (RTMP) very slow

Hello, I have an application for live video, live stream from the encoder(rstp://192.168.1.168/ch01),When Publishing the stream&#65292;

User Adobe Flash Player at [install-dir]/examples/LiveVideoStreaming/FlashRTMPPlayer/player.html,playback this RTMP stream(Server: rtmp://[wowza-ip-address]/live,Stream: rtmp.stream) ,Very slow, the screen for a long time still, the effect is not ideal, when using VLC player rtsp :/ / [wowza-ip-address]: 1935/live/camera.stream when results were pretty good! Why this is so, can you tell me how to solve this question it? Thank you very much!